Cathodoluminescence in Post Carbonates


Source : Luminescence Microscopy and Spectroscopy : Qualitive and Quantitative Applications
(Charles E. Barker and Otto C. Kopp, Editors)


 Cathodoluminescent magnesian calcite  micrite cement in shelly biomicrite of the  Texas Gulf Coast inner shelf. Skeletal  fragments are noncathodoluminescent, and  siliciclastic accessory grains have a bluish  cathodoluminescence

 Texas Gulf Coast inner shelf

 Sample courtesy of B.  H. Wilkinson,  University of Michigan

 Bladed and blocky magnesian calcite  cements from the lower slope of Little  Bahama Bank. Banded cathodoluminescence  traceable from bladed cements to blocky  cements indicates that these two cement  habits are coeval.

 Little Bahama Bank

 Banded cathodoluminescence in  low-magnesium calcite cements from the late  Pleistocene of the Yucatan Peninsula. These  cements formed within the interstices of  corals; the coral skeletal material was  subsequently dissolved

 Late Pleistocene of the Yucatan Peninsula

 Sample courtesy of W. C. Ward, University of  New Orleans

 Dully cathodoluminescent dolomite from a  216,000 yr BP reef terrace on Barbados,  West Indies

 Reef terrace on Barbados, West Indies

 Sample courtesy of J. D. Humphrey,  University of Texas at Dallas

 Calcite spar cement precipitated in the  meteoric vadose zone of the Pleistocene  Miami Limestone. Very thin, hairline zones  are brightly cathodoluminescent

 Pleistocene Miami Limestone

 Sample courtesy of C. E. Barker, US Geology  Survey

 Subhedral and euhedral dolomite crystals  containing brighy to dully cathodoluminescent  zones from the Plio-Pleistocene Seroe Domi  Formation of Bonaire, Netherlands Antilles.  The noncathodoluminescent areas in this field  of view are low-magnesium calcite.

 Plio-Pleistocene Seroe Domi Fm.
 Bonaire, Netherlands Antilles